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refactor test example #4159

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Merged
merged 1 commit into from
Nov 14, 2025
+10 −12
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refactor test example #4159

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22 changes: 10 additions & 12 deletions spring-kafka-docs/src/main/antora/modules/ROOT/pages/testing.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -158,21 +158,19 @@ public final class EmbeddedKafkaHolder {
private static EmbeddedKafkaBroker embeddedKafka = new EmbeddedKafkaZKBroker(1, false)
.brokerListProperty("spring.kafka.bootstrap-servers");

private static boolean started;
private static volatile boolean started;

public static EmbeddedKafkaBroker getEmbeddedKafka() {
if (!started) {
synchronized (this) {
if (!started) {
try {
embeddedKafka.afterPropertiesSet();
}
catch (Exception e) {
throw new KafkaException("Embedded broker failed to start", e);
}
started = true;
}
}
synchronized (EmbeddedKafkaBroker.class) {
try {
embeddedKafka.afterPropertiesSet();
}
catch (Exception e) {
throw new KafkaException("Embedded broker failed to start", e);
}
started = true;
}
}
return embeddedKafka;
}
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